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The SOUNDEX () function is an algorithm that converts any text string into a letter pattern that describes the speech representation.He considered similar to pronounced characters and bytes, and was able to compare the pronunciation of the text

  -- Sentence skill 1. Data OperationsSelect -- retrieve data rows and columns from database tablesInsert -- add new data rows to the database tableDelete -- delete data rows from a database tableUpdate -- update data in the database table 2.

PL/SQL single-line functions and group functionsA function is a program that has 0 or more parameters and has a return value. Oracle built a series of functions in SQL that can be called SQL or PLFunctions are divided into two main categories:Single-

Comparison of common functions for SQL Server to Oracle 1. Absolute ValueS: Select ABS (-1) ValueO: Select ABS (-1) value from dual 2. INTEGER (large)S: Select ceiling (-1.001) ValueO: Select Ceil (-1.001) value from dual 3. Round (small)S: Select

Generally, the entire string is used as the operation object, for example: search for a substring in a substring, obtain a substring, insert a substring at a certain position in the substring, and delete a substring. Generally, the entire string is

Generally, the entire string is used as the operation object, for example: search for a substring in a substring, obtain a substring, insert a substring at a certain position in the substring, and delete a substring. The required and sufficient

String is a finite sequence composed of zero or multiple characters. It is generally recorded as s = 'a1a2 • an '(n> = 0 ). It is the data type that represents text in programming languages.Generally, the entire string is used as the operation

Generally, the entire string is used as the operation object, for example: search for a substring in a substring, obtain a substring, insert a substring at a certain position in the substring, and delete a substring. The required and sufficient

First, before the introduction of the use of functions to process data, the use of DBMS (database management system) to deal with the data caused by the problem!1. Unlike almost all DBMS support for SQL statements (such as Select), each DBMS has a

-The 11th chapter uses data processing Functions "> 11th use data processing functionsThis chapter describes what functions are, what functions MySQL supports, and how to use these functions.-11.1 Function ">11.1 function"Like most other computer